Question

I would like to use a mechanism where users can CTRL-click a select list in a Form, after which the selected items are put into a text box (e.g. seperated by a comma).

Is this at all possible in TWiki?

Example: A Form item 'Fruit' has multi-select box with the items:

• apple
• pear
• grape

The user CTRL-clicks on 'apple' and 'grape'. When the user clicks 'Save', the Form reads:

Fruit: apple, grape

Environment

-- JosMaccabiani - 15 Jun 2005

Answer

Are you referring to TWikiForms? If so, this is not directly supported, but as a workaround you can define a checkbox list. Example for definition:

TWiki supports also plain HTML, e.g. you can define a multi-select <select>, but then you need a script to store the form data.

-- PeterThoeny - 16 Jun 2005

Thanks for your quick reply. It does inspire some new questions though.

On checkboxes: I have three lists with keywords to use in classifying 'knowledge topics'. These lists are 30+ items in size currently. So checkboxes are not really an option. (The form gets to big in edit mode)

I would like the end result to be at once user friendly (i.e. the multi-select) and restrictive (i.e. users cannot type in keywords themselves to prevent typos and really odd words which will not be retrieved by a search)

1. I can see the use in a multi-select html form in a 'Create New Page' type setting (like AskedQuestions). I know how to create this dynamically now because of your nice answer in ExtractValuesFromTable. Any pointers to relevant topics for a script to put this info in the form?
2. Is such a construct also usable once the form is in place to change values? Has anyone tried this?

-- JosMaccabiani - 16 Jun 2005

The current TWikiForms handling does not support that. You could overload the functionality with a Plugin. See FormFieldsPlugin for an example.

-- PeterThoeny - 03 Jul 2005

If all you are looking for is an example of a plugin that adds a field type, try DateFieldPlugin.

-- CrawfordCurrie - 03 Jul 2005

Refactored out all comments related to PluginAddonsCorruptWhenDownloading

Also see MultipleSelectionBox

-- JosMaccabiani - 02 Sep 2005